import java.util.*;
public class Example15{
	public static void main(String[] args){
		Map map = new HashMap();
		map.put("1","Jack");
		map.put("2","Rose");
		map.put("3","Lucy");
		map.put("3","Tom");
		System.out.println("1"+map.get("1"));
		System.out.println("2"+map.get("2"));
		System.out.println("3"+map.get("3"));
	}
}